Vitamin C, also known as ascorbic acid (AA) and ascorbate, is everywhere in nature and critical to many functions in the human body. It is a potent antioxidant. Vitamin C works on hyperpigmentation by impacting the production of melanin, which is a reservoir for damaging oxygen free radicals.
From a skin perspective, Vitamin C protects us from the sun, plays a significant role in collagen synthesis, and can be used for the proactive removal of hyperpigmented spots.